EP3405532A1 - Revêtement avec résistance au marquage des métaux - Google Patents

Revêtement avec résistance au marquage des métaux

Info

Publication number
EP3405532A1
EP3405532A1 EP17741852.2A EP17741852A EP3405532A1 EP 3405532 A1 EP3405532 A1 EP 3405532A1 EP 17741852 A EP17741852 A EP 17741852A EP 3405532 A1 EP3405532 A1 EP 3405532A1
Authority
EP
European Patent Office
Prior art keywords
composition
article
coating
component
coating composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17741852.2A
Other languages
German (de)
English (en)
Other versions
EP3405532A4 (fr
Inventor
Larry W. Ashby
Deann K. PLUMMER
Kevin L. MARSHALL
Michelle J. BROWNLEE
Channing C. BEAUDRY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Swimc LLC
Original Assignee
Swimc LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Swimc LLC filed Critical Swimc LLC
Publication of EP3405532A1 publication Critical patent/EP3405532A1/fr
Publication of EP3405532A4 publication Critical patent/EP3405532A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/004—Reflecting paints; Signal paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/42—Gloss-reducing agents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/17—Amines; Quaternary ammonium compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
    • C08K5/3477—Six-membered rings
    • C08K5/3492—Triazines
    • C08K5/34922—Melamine; Derivatives thereof

Definitions

  • Polymer coating compositions are routinely applied to substrates, especially metal substrates. Such coatings are used for a variety of reasons, including, for example, to protect the substrate from degradation, to beautify the substrate (e.g., to provide color, brightness, etc.), and/or to reflect light.
  • polymer coating compositions are applied on planar substrates (e.g., using coil coating processes) that are subsequently formed into finished articles, including articles used as exterior building materials, for light fixtures, and the like.
  • the coating must also maintain a suitable aesthetic appearance (gloss, color, and the like) over prolonged periods of exposure to various conditions, including light, humidity, rain, fluctuating temperatures, and the like.
  • coil coated parts may incur incidental marks or other surface defects through contact with other metal parts or surfaces.
  • the finished product then will have a marred appearance and may need to be cleaned.
  • these surface marks are so numerous and frequent that the part cannot be effectively cleaned or used and must be scrapped, leading to material waste and increased cost.
  • Figure 1 shows a photographic comparison of panels coated with coating compositions having high gloss, low gloss, and very low gloss.
  • the present description provides a cured coating formed from a coating composition that forms demonstrates resistance to metal marking when cured.
  • the coating composition includes a binder system that comprises at least a first binder resin component.
  • the coating composition may include other ingredients, including one or more of the following: (i) a crosslinking agent, (ii) a catalyst, (iii) pigments, and/or (iv) a texture-producing additive, and/or (v) a flow agent, among other components.
  • the composition forms a low gloss coating with a 60° gloss rating of about 5, and does not show appreciable marking, marring or other surface defects caused by incidental contact with other metal surfaces.
  • the present description provides coated articles, typically metal substrates, having disposed on at least a portion of the substrate a cured coating formed from the coating composition described herein.
  • the present invention provides a method of producing an article from a metal substrate, wherein the substrate has, disposed on at least a portion of its surface, a cured coating formed from the coating composition described herein.
  • alkyl group is intended to include not only pure open chain saturated hydrocarbon alkyl substituents, such as methyl, ethyl, propyl, t-butyl, and the like, but also alkyl substituents bearing further substituents known in the art, such as hydroxy, alkoxy, alkylsulfonyl, halogen atoms, cyano, nitro, amino, carboxyl, etc.
  • alkyl group includes ether groups, haloalkyls, nitroalkyls, carboxyalkyls, hydroxyalkyls, sulfoalkyls, etc.
  • alkyl moiety is limited to the inclusion of only pure open chain saturated hydrocarbon alkyl substituents, such as methyl, ethyl, propyl, t-butyl, and the like.
  • hydrocarbyl moiety refers to unsubstituted organic moieties containing only hydrogen and carbon.
  • group is intended to be a recitation of both the particular moiety, as well as a recitation of the broader class of substituted and unsubstituted structures that includes the moiety.
  • crosslinker refers to a molecule capable of forming a covalent linkage between polymers or between two different regions of the same polymer.
  • polymer includes both homopolymers and copolymers (i.e., polymers of two or more different monomers).
  • a term designating a polymer class such as, for example, “polyester” is intended to include both homopolymers and copolymers (e.g., polyester- urethane polymers).
  • silicone refers to polymerized siloxanes or polysiloxanes, which are mixed inorganic-organic polymers with the general structural formula [R 2 SiO]n, where R is substituted or unsubstituted C1-C12 alkyl, C1-C12 alkoxy, C6-C10 aryl, and the like.
  • the silicone is a hydroxy-functional or alkoxy- functional polysiloxane.
  • metal marking refers to the marks, scratches, or other defects incurred by a coated article or surface as a result of contact with other (typically bare) metal surfaces or articles. These marks are usually black or gray, and white and/or light-colored coil coatings are more susceptible to metal marking than dark-colored coatings. Metal marking tends to occur most frequently during forming or fabrication processes.
  • Soft touch or “soft to the touch,” as used herein refers to a coated surface with a low gloss velvet-like appearance that simulates the sense of touch. The terms are used interchangeably herein with the term “tactile” or "tactile feel.”
  • a coating composition that comprises “an” additive can be interpreted to mean that the coating composition includes “one or more” additives.
  • the present description provides a cured coating formed from a thermosetting coating composition that exhibits excellent resistance to metal marking.
  • the coating composition typically comprises a binder system, a crosslinking agent, a catalyst, a flow agent, one or more pigments, and an optional liquid carrier, along with a texturing additive.
  • the binder system preferably includes at least a first resin component, and optionally, one or more additional resin components.
  • the coating composition includes at least a film-forming amount of the binder system.
  • compositions including a liquid carrier are presently preferred, it is contemplated that the composition described herein may have utility in other coating application techniques such as, for example, powder coating, extrusion, or lamination.
  • the binder system described herein includes at least a first resin component.
  • the first resin component is preferably a polyester resin, more preferably a durable polyester resin.
  • Suitable polyesters include, for example, resins formed by reaction of compounds having reactive functional groups such as, for example, compounds with hydroxyl, carboxyl, anhydride, acyl, or ester functional groups. Hydroxyl functional groups are known to react, under proper conditions, with acid, anhydride, acyl or ester functional groups to form a polyester linkage.
  • Suitable compounds for use in forming the polyester resin include mono-, di-, and multi-functional compounds. Di-functional compounds are presently preferred.
  • Suitable compounds include compounds having reactive functional groups of a single type (e.g., mono-, di-, or poly-functional alcohols or mono-, di-, or poly-functional acids) as well as compounds having two or more different types of functional groups (e.g., a compound having both an anhydride and an acid group, or a compound having both an alcohol and an acid group, etc.).
  • the binder system may include one or more additional resin components that are the same as, or different from, the first resin component.
  • the binder system includes a second polyester resin component in addition to the first resin component.
  • the second polyester resin component is preferably a silicone-modified or siliconized polyester resin.
  • Suitable siliconized polyesters include those formed by the reaction of silicone-functional compounds with compounds having other reactive functional groups such as, for example, compounds with hydroxyl, carboxyl, anhydride, acyl, or ester functional groups.
  • Suitable silicone- functional compounds include, for example, polymerized siloxanes (also known as organo-siloxanes or organic poly siloxanes) of the general formula [R 2 SiO] n , where R is typically CI -CI 2 alkyl (preferably methyl or ethyl), CI -CI 2 alkoxy (preferably methoxy or ethoxy), aryl (preferably phenyl), and the like.
  • the polymerized siloxanes include reactive functional groups, such as hydroxyl groups, alkoxy groups, silanol groups, and the like.
  • Preferred siliconized polyesters as used herein are further described in Applicants' co-pending international application, PCT/US2014/070096, filed January 9, 2015.
  • the amount of siliconized polyester is preferably about 5 to 60 wt%, more preferably about 10 to 55 wt%, based on the total weight of the binder system.
  • the amount of the binder system in the coating composition described herein is preferably about 1 to 65 wt%, more preferably about 15 to 50 wt%, and most preferably about 20 to 40 wt%, based on the total weight of the coating composition.
  • the amount of binder used in the composition will vary depending on the resin component(s) selected.
  • the coating composition further includes a crosslinker or crosslinking agent.
  • the crosslinker may be used to facilitate cure of the coating and to build desired physical properties.
  • the amount of crosslinker will vary depending upon a variety of factors, including, e.g., the intended end use and the type of crosslinker.
  • one or more crosslinkers will be present in the coating composition in an amount greater than about 0.01 wt-%, more preferably from about 5 wt% to about 50 wt%, even more preferably from about 10 wt% to about 30 wt%, and most from about 15 wt% to about 20 wt%, based on total weight of resin solids.
  • Polyesters having hydroxyl groups are curable through the hydroxyl groups.
  • Suitable hydroxyl -reactive crosslinking agents may include, for example, aminoplasts, which are typically oligomers that are the reaction products of aldehydes, particularly formaldehyde; amino- or amido-group-carrying substances exemplified by melamine, urea, dicyandiamide, benzoguanamine and glycoluril; blocked isocyanates, or a combination thereof.
  • Suitable crosslinkers include aminoplasts, which are modified with alkanols having from one to four carbon atoms. It is suitable in many instances to employ precursors of aminoplasts such as hexamethylol melamine, dimethylol urea,
  • Suitable commercial amino crosslinking agents include those sold by Cytek under the tradename CYMEL (e.g., CYMEL 301, CYMEL 303, and CYMEL 385 alkylated melamine- formaldehyde resins, or mixtures of such resins, are useful) or by Solutia under the tradename RESIMENE.
  • Suitable crosslinkers may also include blocked isocyanates, such as, for example, as described in U.S. Pat. No. 5,246,557.
  • Blocked isocyanates are isocyanates in which the isocyanate groups have reacted with a protecting or blocking agent to form a derivative that will dissociate on heating to remove the protecting or blocking agent and release the reactive isocyanate group.
  • suitable blocking agents for polyisocyanates include aliphatic, cycloaliphatic or aralkyl monohydric alcohols, hydroxylamines and ketoximes.
  • Presently preferred blocked polyisocyanates dissociate at temperatures of around 160°C.
  • the presence of a catalyst is preferred to increase the rate of reaction between the liberated polyisocyanate and the active hydrogen-containing compound (e.g., a hydroxyl -functional polyester).
  • the catalyst can be any suitable catalyst such as, for example, dibutyl tin dilaurate or triethylene diamine.
  • Suitable crosslinkers also include unblocked isocyanates.
  • Unblocked isocyanates are difunctional or polyfunctional isocyanates with free isocyanate groups attached to aliphatic, cycloaliphatic, aryl, araliphatic and/or aromatic moieties. Examples include, without limitation, tetram ethylene diisocyanate, hexamethylene diisocyanate, dodecamethylene diisocyanate, 1,4-diisocyanatocyclohexane, 3,5,5-trimethylcyclohexyl isocyanate, isophorone diisocyanate, and the like.
  • an ultraviolet curing crosslinker or an electron-beam curing crosslinker may be suitable.
  • suitable such crosslinkers may include 1,6-hexanediol diacrylate, 1,4-butanediol diacrylate, trimethylolpropane triacrylate, or mixtures thereof.
  • the coating composition described herein may be produced by conventional methods known to those of skill in the art.
  • the coating composition is prepared by use of a polymerization or processing aid, such as a catalyst, for example.
  • processing aids include, without limitation, metal catalysts (e.g., stannous oxalate, stannous chloride, butylstannoic acid, dibutyl tin oxide, tetrabutyltitanate, or tetra butylzirconate), antioxidants (e.g., hydroquinone, monotertiarybutyl-hydroquinone, benzoquinone, l,4-napthoquinone,2,5-diphenyl-p-benzoquinone, or p-tert
  • metal catalysts e.g., stannous oxalate, stannous chloride, butylstannoic acid, dibutyl tin oxide, tetrabutyltitanate, or tetra
  • butylpyrocatechol unblocked and blocked acid catalysts (e.g., dinonylnaphthalene sulfonic acid, dinonylnaphthalene disulfonic acid, dodecyl benzene sulfonic acid, p- toluene sulfonic acid, phosphate esters, and mixtures or combinations thereof), and mixtures thereof.
  • the amount of catalyst depends on the amount and nature of the reactants, but is up to about 5 wt%, preferably up to about 2 wt%, based on the total weight of resin solids.
  • the coating composition described herein includes one or more pigments.
  • the pigment is preferably dispersed in the siliconized polyester component or in the melamine crosslinking agent.
  • the pigment is preferably dispersed in the siliconized polyester component or in the melamine crosslinking agent.
  • tint pastes may be used or combined with other pigments and incorporated into the coating composition to achieve the desired color or shade.
  • the pigment may be dispersed in a blending polymer.
  • Blending polymers include, for example, saturated polyesters, aliphatic polyurethane dispersions, and the like.
  • the blending resin has a larger particle size and lower cost than either the first polyester resin or the siliconized polyester, and may be used as a partial replacement for the first polyester resin, or to influence specific coating properties such as, for example, flexibility.
  • the pigmen binder weight ratio of the coating composition is preferably at least 0.02: 1 to about 1.4: 1. In certain embodiments, the pigmen binder weight ratio does not exceed about 1.4: 1.
  • additives known in the art may be included in the coating composition described herein. These additives include, without limitation, flatting agents, flow or viscosity modifiers, texture-providing additives, waxes and/or other binders that may be included or dispersed in the coating composition.
  • the coating described herein is a very low gloss coating. Such low gloss coatings are useful as they cover imperfections on substrate surfaces better than coatings with higher gloss, providing significant advantages during fabrication.
  • a cured coating formed from the composition described herein demonstrates specular 60° gloss (as measured by a handheld gloss meter) of about 10, preferably 1 to 5, more preferably, less than 5.
  • low gloss coatings are prepared by including one or more flatting agents in the coating composition.
  • Suitable flatting agents include, for example, silica, silica-based materials, or other materials with particles known to provide easy dispensability.
  • the amount of flatting agent depends on the desired gloss or reflectivity of the cured coating.
  • a typical low gloss coating composition may include up to about 6 wt%, preferably 1 to 5 wt%, of a silica or silica-based flatting agent, based on the total weight of resin solids in the composition.
  • a coating composition would have to include a significant excess of flatting agent, and at such high flatting agent levels, the beneficial mechanical properties of the composition would be lost.
  • the composition described herein demonstrates very low 60° gloss, but does not include a significant excess of flatting agent and shows no loss in beneficial mechanical properties.
  • the compositions described herein produce very low gloss cured coating as a result of forming a microtextured or microwrinkled surface topography. Without limiting to theory, this microwrinkled surface topography is believed to cause diffused reflection as a result of light scattering and subscattering from the irregular surface of the coating.
  • the coating composition described herein includes a texture-producing additive intended to produce a microwrinkled surface when the coating is cured. Accordingly, in an embodiment, the coating composition described herein includes an amine additive to produce the micrownnkled surface topography. Without limiting to theory, it is believed that the amine tends to volatilize as the coating composition is cured and surface wrinkles are formed as a result.
  • the texture-producing additive is an amine having the general formula (I):
  • R 1 , R 2 , and R 3 may each independently be -H; unsubstituted C1-C10 alkyl; substituted C1-C10 alkyl, wherein the substituents include C1-C10 alkyl, alkenyl, aryl, halide, hydroxyl, and the like; unsubstituted and substituted C4-C10 branched alkyl; unsubstituted aryl; substituted aryl, wherein the substituents include C1-C10 alkyl, alkenyl, aryl, halide, hydroxyl, and the like; C1-C10 ketone; C1-C10 aldehyde; C1-C10 ether; aryl ketone; aryl aldehyde; aryl ether; and the like, and mixtures or combinations thereof.
  • the coating composition described herein includes the amine additive in an amount of preferably about 0.001 to 5 wt%, more preferably 0.1 to 2 wt%, based on the total weight of the composition.
  • the coating composition described herein includes one or more flow modifiers.
  • flow or viscosity modifiers are typically used to aid in air release and improve the flow of the composition to allow for application to a substrate.
  • Suitable flow modifiers include, for example, silicone-based compounds, metal salts of aromatic carboxylic acids (e.g., unsubstituted salicylic acid, unsubstituted naphthoic acid, alkyl- or aralkyl-substituted salicylic acid, alkyl- or aralkyl-substituted naphthoic acid, and the like), metal salts of aromatic hydroxy-functional carboxylic acids (e.g., 2-hydroxy-3- naphthoic acid, alkyl -substituted 2-hydroxy-3 -naphthoic acid, and the like), and the like.
  • the flow modifier is a silicone-based compound and is present in an amount of about 1 wt%, preferably 0.01 to
  • the coating composition described herein includes one or more waxes.
  • the wax is typically used to aid in handling of the coating composition prior to application, and may also be used to reduce or prevent abrasion of the cured coating.
  • Suitable waxes include, for example, naturally occurring waxes (e.g., carnauba and the like), polymeric waxes (e.g., polyethylene-polyvinyl acetate wax, polyethylene glycol wax, and the like), etc.
  • the coating composition described herein includes a polymeric was, such as PTFE wax or polyethylene wax, and the wax is present in amount of up to about 15 wt%, preferably about 1.5 to 10 wt%, based on the total weight of resin solids in the composition.
  • a polymeric was such as PTFE wax or polyethylene wax
  • the wax is present in amount of up to about 15 wt%, preferably about 1.5 to 10 wt%, based on the total weight of resin solids in the composition.
  • the total amount of solids present in the coating composition described herein may vary depending upon a variety of factors including, for example, the desired method of application.
  • the coating composition will typically include from about 30 to about 65 wt% of solids. In some embodiments, the coating composition may include as much as 80 wt% or more of solids.
  • Preferred cured coating compositions of the invention have excellent adhesion, hardness, flexibility, and demonstrate resistance to metal marking.
  • the combined properties of low gloss and improved resistance to metal marking provide a significant advantage over existing technologies , particularly in reducing the amount of finished parts that must be scrapped after fabrication.
  • the article may incur incidental marks from contact with bare metal from other parts or surfaces involved in coil coating. These marks may be numerous enough or present in locations that render the article unusable. As a result, the coated article has to be scrapped. Using a coating that reduces the occurrence of these marks and/or hides the appearance of these marks will reduce the amount of scrap and off-grade products or articles generated during the fabrication process.
  • the coating composition described herein when applied to a substrate and cured, preferably demonstrates durability and improved resistance to metal marking relative to commercially available coil coatings. Without limiting to theory, this is believed to be a result of the microwrinkled surface topography of the coating. This leads to a reduction in the number of marks or color transferred to the coated surface, and an overall reduction in fabrication and processing costs.
  • the cured coating described herein may also demonstrate other useful performance characteristics such as, for example, pencil hardness, flexibility, high reflectance, and the like.
  • the coating composition described herein provides a cured coating with a soft touch or tactile feel.
  • the microwrinkled or microtextured surface topography provides a very low gloss surface that simulates the sense of touch.
  • the coating composition described herein may be applied by a variety of methods known to those of skill in the art.
  • the composition is applied to planar metal surfaces using a coil coating process.
  • the coating is preferably applied as a thin film, with thickness in the range of preferably 0.1 to 5 mil, more preferably 0.5 to 2 mil.
  • the coating composition has utility in a multitude of applications.
  • the coating composition of the invention may be applied, for example, as an intermediate coat, as a topcoat, or any combination thereof.
  • the coating composition may be applied to sheet metal such as is used for lighting fixtures, architectural metal skins (e.g., gutter stock, window blinds, siding and window frames and the like) by spraying, dipping, or brushing, but is particularly suited for a coil coating operation where the composition is applied onto the sheet as it unwinds from a coil and then baked as the sheet travels toward an uptake coil winder.
  • the coating composition of the invention may have utility in a variety of other end uses, including, industrial coating applications such as, e.g., appliance coatings; packaging coating applications; interior or exterior steel building products; HVAC applications; agricultural metal products; wood coatings; etc.
  • industrial coating applications such as, e.g., appliance coatings; packaging coating applications; interior or exterior steel building products; HVAC applications; agricultural metal products; wood coatings; etc.
  • the cured coating described herein is used as an exterior coating for building materials, architectural skins and the like.
  • Non-limiting examples of metal substrates that may benefit from having a coating composition of the invention applied on a surface thereof include hot-rolled steel, cold-rolled steel, hot-dip galvanized, electro-galvanized, aluminum, tin plate, various grades of stainless steel, and aluminum-zinc alloy coated sheet steel (e.g., GALVALUME sheet steel).
  • the coating is typically cured or hardened in a heated temperature environment of from about 200 to 500°C, more preferably from about 270 to 470°C.
  • the coating is typically baked for 8 to 25 seconds, to a peak metal temperature (PMT) of from about 200 to 250°C.
  • PMT peak metal temperature
  • Coating compositions (#1 through #3) as shown in Table 1 were prepared by combining a binder system including a polyester resin with a melamine curing agent. The resin and crosslinking agent were blended together using standard mixing techniques known in the art, along with minimum levels of flow agents to facilitate air release during the coil coating process. A flatting agent is included to provide either high gloss (coating #1) or low gloss (coating #2), with gloss measured at a 60° angle with a handheld gloss meter (Byk Gardener). For coating #3, a texture-providing amine additive is included to produce a very low gloss coating. The coating compositions were combined with one or more pigments to produce coatings as shown in Table 1. The coating compositions were applied to metal panels using standard application methods, and baked at peak metal temperatures of about 200° to 250°C.
  • Example 1 The coating compositions of Example 1 were applied to test panels, baked, and subjected to contact with a metal marker. The panels were then viewed under a microscope and images were generated as shown in Figure 1. Distinct metal marks could be seen on the panels having high gloss and low gloss coatings, with the color of the mark more pronounced in the low gloss coating. In contrast, no distinct metal marks or color transfer are observed with the very low gloss coating and only a small change in surface appearance is seen when viewed under greater magnification.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne une composition de revêtement ayant une excellente durabilité et une excellente résistance au marquage des métaux. La composition de revêtement comprend un système de liant comportant au moins un premier constituant de résine, éventuellement, un ou plusieurs autres constituants de résine, un constituant de réticulation et un constituant de production de texture. L'invention concerne également des articles revêtus de la composition de revêtement appliquée sur au moins une partie de leur surface.
EP17741852.2A 2016-01-21 2017-01-18 Revêtement avec résistance au marquage des métaux Withdrawn EP3405532A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201662281327P 2016-01-21 2016-01-21
US201662281388P 2016-01-21 2016-01-21
PCT/US2017/013945 WO2017127429A1 (fr) 2016-01-21 2017-01-18 Revêtement avec résistance au marquage des métaux

Publications (2)

Publication Number Publication Date
EP3405532A1 true EP3405532A1 (fr) 2018-11-28
EP3405532A4 EP3405532A4 (fr) 2019-08-07

Family

ID=59362074

Family Applications (2)

Application Number Title Priority Date Filing Date
EP17741812.6A Active EP3405531B1 (fr) 2016-01-21 2017-01-17 Revêtement à haute réflectance
EP17741852.2A Withdrawn EP3405532A4 (fr) 2016-01-21 2017-01-18 Revêtement avec résistance au marquage des métaux

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP17741812.6A Active EP3405531B1 (fr) 2016-01-21 2017-01-17 Revêtement à haute réflectance

Country Status (5)

Country Link
US (2) US10844240B2 (fr)
EP (2) EP3405531B1 (fr)
CN (1) CN108473797A (fr)
MX (2) MX2018008786A (fr)
WO (2) WO2017127361A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017127361A1 (fr) 2016-01-21 2017-07-27 Valspar Sourcing, Inc. Revêtement à haute réflectance

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436367A (en) 1967-08-04 1969-04-01 Sherwin Williams Co Process and composition for improving metal marking properties in polyester resin low gloss coatings
US4097302A (en) 1976-02-17 1978-06-27 Scm Corporation Flatting agents
US5246557A (en) 1984-02-29 1993-09-21 The Baxenden Chemical Co. Blocked isocyanates
US4520188A (en) 1984-09-13 1985-05-28 Whittaker Corporation Polyester-forming composition for coil coatings, improved polyester resin and method of making same
US4968775A (en) 1990-04-12 1990-11-06 The Glidden Company Thermosetting polyester coating
US5688598A (en) 1996-06-28 1997-11-18 Morton International, Inc. Non-blistering thick film coating compositions and method for providing non-blistering thick film coatings on metal surfaces
US6350821B1 (en) * 1999-06-28 2002-02-26 Basf Corporation Matte powder coating
US6399670B1 (en) 2000-01-21 2002-06-04 Congoleum Corporation Coating having macroscopic texture and process for making same
TWI313380B (en) 2005-08-31 2009-08-11 Eternal Chemical Co Ltd Reflector having high light diffusion
US20110117292A1 (en) 2007-07-13 2011-05-19 Shaobing Wu Methods for controlling coating gloss
JP2009151143A (ja) * 2007-12-21 2009-07-09 Nippon Fine Coatings Inc 光反射板用塗料組成物、光反射板用プレコート金属板及び液晶表示装置用光反射板
US9834684B2 (en) 2009-03-11 2017-12-05 Imerys Filtration Minerals, Inc. Natural amorphous silica filler products
CN107868583A (zh) * 2010-11-02 2018-04-03 阿克佐诺贝尔国际涂料股份有限公司 无光泽有纹理粉末单涂层涂料组合物
US20150132521A1 (en) 2012-02-17 2015-05-14 Akzo Nobel Coatings International B.V. Low-gloss soft-touch thermoformable paint film laminate
US20150103529A1 (en) * 2012-04-19 2015-04-16 GE Lighting Solutions, LLC Methods of forming reflective coatings and lighting systems provided therewith
US10093829B2 (en) * 2012-10-19 2018-10-09 Ppg Industries Ohio, Inc. Curable film-forming compositions demonstrating burnish resistance and low gloss, and methods of improving burnish resistance of a substrate
US20140275396A1 (en) 2013-03-15 2014-09-18 Ppg Industries Ohio, Inc. Low gloss acrylic coatings containing isophthalic polyester compositions
CN105829395A (zh) 2013-12-17 2016-08-03 威士伯采购公司 硅酮改性的聚酯涂料
KR20160011867A (ko) * 2014-07-23 2016-02-02 엘에스산전 주식회사 비절연형 인버터 어셈블리
WO2016028300A1 (fr) 2014-08-21 2016-02-25 Trilumacoat Revêtements à réflectance totale élevée, à faible brillance et leurs procédés de fabrication
EP3354693A4 (fr) 2015-09-24 2019-05-22 Kansai Paint Co., Ltd Procédé de production d'une dispersion de particules de silice enrobées d'une résine acrylique
JP6869184B2 (ja) 2015-10-01 2021-05-12 関西ペイント株式会社 塗料組成物
WO2017127361A1 (fr) 2016-01-21 2017-07-27 Valspar Sourcing, Inc. Revêtement à haute réflectance

Also Published As

Publication number Publication date
CN108473797A (zh) 2018-08-31
MX2018008786A (es) 2018-09-21
EP3405531A4 (fr) 2019-08-07
MX2018008783A (es) 2018-09-21
US20190218416A1 (en) 2019-07-18
WO2017127429A1 (fr) 2017-07-27
EP3405531B1 (fr) 2023-10-04
EP3405532A4 (fr) 2019-08-07
EP3405531A1 (fr) 2018-11-28
WO2017127361A1 (fr) 2017-07-27
US10844240B2 (en) 2020-11-24
US20190010334A1 (en) 2019-01-10

Similar Documents

Publication Publication Date Title
US11104762B2 (en) Silicone-modified polyester coating
CN101821318B (zh) 水性复合树脂组合物、含有其的涂布剂、以及使用其的层压体
US20160297987A1 (en) Silicone-modified polyester coating
JP5074055B2 (ja) 上塗塗料組成物
JP2008081719A (ja) 上塗塗料組成物
JP5840132B2 (ja) 耐久性に優れた耐汚染塗料組成物
JP2007222709A (ja) 塗装鋼板
US20190010334A1 (en) Coating with metal marking resistance
TWI625369B (zh) Metal-resistant coating
WO2008146103A1 (fr) Compositions de résine pour peinture à fini plissé
TWI625370B (zh) Highly reflective coating
KR101104935B1 (ko) 요철이 형성된 변색도장강판
KR20200109708A (ko) Pcm 칼라강판용 불연성 도료 조성물
JP2001334209A (ja) クリヤー塗膜の形成方法
WO2017015061A1 (fr) Nouveau polyester d'origine biologique
JP2007276187A (ja) 塗装鋼板
JP3092096B2 (ja) 被覆用組成物および被覆物品
JP2001334200A (ja) クリヤー塗膜の形成方法
JP2002129111A (ja) 塗料組成物

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20180821

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
A4 Supplementary search report drawn up and despatched

Effective date: 20190705

RIC1 Information provided on ipc code assigned before grant

Ipc: C09D 5/33 20060101ALI20190701BHEP

Ipc: C09D 167/00 20060101ALI20190701BHEP

Ipc: B32B 27/36 20060101ALI20190701BHEP

Ipc: F21V 7/22 20180101AFI20190701BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20200204